#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int sum(int x,int y)
{
	return x + y;
}

int main()
{
	int (*pf)(int, int) = &sum;
	return 0;





	

	typedef void(*pf_t)(int);


	pf_t  signal(int, pf_t);

	 
}


